Mash Seventy - Page 200

Chapter 8 Information service Section 1Troubleshooting
8-6
Complaint Symptom and possible causes Remedy
Noisy engine. Excessive valve chatter
1.
Too large tappetclearance.
2.
Weakenedorbrokenvalvesprings.
3.
Worntappetorcamsurface.
4.
Wornandburntcamshaftjournal.
Noise seems to come from piston
1.
Worndownpistonsorcylinders.
2.
Combustionchambersfouledwithcarbon.
3.
Wornpistonpinsorpistonpinbore.
4.
Wornpistonringsorringgrooves.
Noise seems to come from cam chain
1.
Stretchedchain.
2.
Wornsprockets.
3.
Tension adjuster notworking.
Noise seems to come from clutch
1.
Clutch spline middle shaft wear
2.
Wornteethofclutchplates.
3.
Distortedclutchplates,drivenanddrive.，
4.
Worn clutch releasebearing.
5.
Weakened clutchdampers.
6.
The clutch spring is weak
Noise seems to come from crankshaft
1. The bearing has defects
2. Crankshaft pin bearing is worn or burned
3. Ball bearing wear or burn damage and burn..
Noise seems to come from transmission
1. Gear wear or friction
2. The intermediate shaft keyway is worn
3. Drive shaft keyway is worn
4. Primary gear wear or friction
5. Bearing wear
Adjust.
Replace.
Replace.
Replace.
Replace.
Clean.
Replace.
Replace.
Replace.
Replace.
Repair or replace.
Replace.
Replace.
Replace.
Replace.
Replace primary driven gear
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.
Replace.